Marble is a type of stone made from small bits of granite or other hard rock that have been treated with an acid or heat to make it smooth. Marble is used in art and architecture, and can be found in many different colors and styles.
Granite is a type of mineral that comes from large pieces of hard rock that have been crushed and heated to make them more soluble in water. granite often has a brown color because the supergene for coloring the rocks comes from the iron minerals in the rock. Granite is often used in landscaping, construction, and other applications where durable, healthy rocks are needed.
